/*
 * Copyright (C) 2008-2008 LeGACY <http://www.legacy-project.org/>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef __LEGACY_WORLDLOG_H
#define __LEGACY_WORLDLOG_H

#include "Common.h"
#include "Policies/Singleton.h"
#include "Errors.h"

#include <stdarg.h>

/// %Log packet to a file
class LEGACY_DLL_DECL WorldLog : public LeGACY::Singleton<WorldLog, LeGACY::ClassLevelLockable<WorldLog, ZThread::FastMutex> >
{
	friend class LeGACY::OperatorNew<WorldLog>;
	WorldLog() : i_file(NULL) { Initialize(); }
	WorldLog(const WorldLog &);
	WorldLog& operator=(const WorldLog &);
	typedef LeGACY::ClassLevelLockable<WorldLog, ZThread::FastMutex>::Lock Guard;

	/// Close the file in destructor
	~WorldLog()
	{
		if( i_file != NULL )
			fclose(i_file);
		i_file = NULL;
	}

	public:
		void Initialize();
		/// Is the world logger active?
		inline bool LogWorld(void) const { return (i_file != NULL); }
		/// %Log to the file
		inline void Log(char const *fmt, ...)
		{
			if( LogWorld() )
			{
				Guard guard(*this);
				ASSERT(i_file);

				va_list args;
				va_start(args, fmt);
				vfprintf(i_file, fmt, args);
				va_end(args);

				fflush(i_file);
			}
			va_list ap;
			va_start(ap, fmt);
			vprintf( fmt, ap);
			va_end(ap);
			fflush(stdout);
		}

	private:
		FILE *i_file;
};

#define sWorldLog WorldLog::Instance()
#endif
